A performance comparision between brush and brushless doubly fed asynchronous generators for wind power systems.

Abstract

This paper presents dynamic modeling and simulation of Brushless Doubly Fed Induction Generator (BDFIG) as an alternative for variable speed wind power applications. The mathematic models of active and reactive power for BDFIG have been developed. The power control systems of a 75 kVA generator and wind turbine were simulated in Matlab/Simulink/SymPower Systems. The generator's control system is based on vector control principles which enable to decouple active and reactive power control. The BDFIG performance is compared to a wound rotor doubly fed induction generator. The power flow in the two generators systems and in the grid is analyzed and compared. The efficiencies of the two systems are compared.

An FMEA-Based Risk Assessment Approach for Wind Turbine Systems: A Comparative Study of Onshore and Offshore

“…Since the mide-1990s, there have also been variable speed wind turbines with gearless generator systems which are equipped with a direct-drive generator and a fully-rated power electronic converter. The brushless doubly fed induction generator (BDFIG) is a well known drive technology which eliminates the need for brushes and slip rings, increases the lifetime of the machine, and ultimately reduces the maintenance costs [24].…”

H2 production based on RDG and assisted by a weak grid. System topology, operation and control

“…(5). This in turn requires knowing the value of P g , which is obtained through a low-pass filter since its variation is slow.…”

“…This scheme allows the system to maintain the wind generation with maximum power transfer at slow wind speed variations. This type of machine is an interesting alternative to the wound rotor induction generator, because it does not require slip rings and presents a greater number of poles reducing significantly the gearbox [5]. It also represents a valid alternative to the permanent magnet synchronous machine because it is cheaper and the converters, necessary for its control, only have to handle a fraction of the total power.…”

Design and control of the Brushless Doubly Fed Twin Induction Generator (BDFTIG)

“…The increase in the use of the BDFIG has been driven by the need to expand the range and operation of wind turbines. A study has been successively conducted on the implementation and control of the BDFIG [5,6], but the BDFIG efficiency is worse than the DFIG at low speeds by 7% [7]. To combine the advantage of the DFIG with the advantage of a brushless machine, the Brushless Doubly Fed Twin Induction Generator (BDFTIG) is being investigated and considered for high power wind generators where variable-speed operation, high reliability and low maintenance are required.…”